261220046 has 8 divisors (see below), whose sum is σ = 393067080. Its totient is φ = 130197688.

The previous prime is 261220021. The next prime is 261220121. The reversal of 261220046 is 640022162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205376 + ... + 206643.

It is an arithmetic number, because the mean of its divisors is an integer number (49133385).

Almost surely, 2^261220046 is an apocalyptic number.

261220046 is a deficient number, since it is larger than the sum of its proper divisors (131847034).

261220046 is a wasteful number, since it uses less digits than its factorization.

261220046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412338.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 261220046 is about 16162.3032393282. The cubic root of 261220046 is about 639.2471991741.

The spelling of 261220046 in words is "two hundred sixty-one million, two hundred twenty thousand, forty-six".